what are the next to terms in the pattern 7, 2, 5, -3, 8, -11

hmmm. It appears that

Tn = T(n-2) - T(n-1)
7-2 = 5
2-5 = -3
5-(-3) = 8
-3-8 = -11
8-(-11) = 19
-11-19 = -30